[mapserver-dev] RE: MapServer 6.0 Beta 1 - Expression Parser question

Lime, Steve D (DNR) Steve.Lime at state.mn.us
Fri Mar 11 08:24:20 EST 2011

Since our attributes are typeless quotes are necessary to denote strings. It's always been that way for expressions. If an 
atrribute is a number you can get away without them and the conversion to a string happens in the parser, but numbers are
also perfectly valid as function parameters and you can do math here too. We can't consider everything a string in
other words.

From: mapserver-dev-bounces at lists.osgeo.org [mapserver-dev-bounces at lists.osgeo.org] On Behalf Of Smith, Michael ERDC-CRREL-NH [michael.smith at usace.army.mil]
Sent: Friday, March 11, 2011 5:10 AM
To: Daniel Morissette; mapserver-dev at lists.osgeo.org
Subject: Re: [mapserver-dev] RE: MapServer 6.0 Beta 1 - Expression Parser       question

No, it doesn't.

No labels with

Labels draw fine


Michael Smith
Remote Sensing/GIS Center
US Army Corps of Engineers

On 3/10/11 11:17 PM, "Daniel Morissette" <dmorissette at mapgears.com> wrote:

> Hopefully the following should work as well, without the need for quotes
> around attribute references, right?
> On 11-03-10 06:21 PM, Lime, Steve D (DNR) wrote:
>> This is expected. It's in the RFC and migration guide. We had to treat these
>> like true expressions so various formatting functions could be introduced.
>> Steve
>> -----Original Message-----
>> From: Smith, Michael ERDC-CRREL-NH [mailto:michael.smith at usace.army.mil]
>> Sent: Thursday, March 10, 2011 5:18 PM
>> To: mapserver-dev at lists.osgeo.org; Lime, Steve D (DNR)
>> Subject: MapServer 6.0 Beta 1 - Expression Parser question
>> Steve,
>> To get the expression parser to label my layers as pre 6.0, I¹ve had to
>> change my TEXT statement from
>> to
>> TEXT ( "[LOCATION]"+" "+"[OBSERVED]"+"[UNITS]" +"$"+"[OBSTIME]" )
>> And put quotes around the string fields. Is this expected behavior or is
>> this a bug with the new expression parser?
>> Mike

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